EP 0219581 B1 19890614 - COMPOSITE INGOT CASTING
Title (en)
COMPOSITE INGOT CASTING
Publication
Application
Priority
US 64190884 A 19840820
Abstract (en)
[origin: US4567936A] A method and system for continuously or semicontinuously casting a composite metal article, such as a structurally composite ingot or the like, wherein one of the principal structural components of the ingot comprises an aluminum-lithium alloy. During such casting by a D.C. (direct chill) conventional tubular mold or electromagnetic process, the aluminum-lithium structural component of a structurally composite ingot is encircled or peripherally encased by a further outer metal cladding component that can be cast simultaneously with the aluminum-lithium component such as another outer aluminous alloy from which lithium is absent as a constituent or impurity, although it may be present and tolerated as a trace element. In this arrangement the aluminum-lithium structural component is prevented during casting from coming into direct contact with the chilling coolant, normally water, with which lithium can react violently. Only the outer aluminous alloy envelope is subjected to the direct contact of a liquid coolant whereby as it solidifies, this outer envelope or peripheral sheath acts as an impervious secondary mold for and protects the inner aluminum-lithium alloy structural component which is then directly controllably chilled and solidified.
IPC 1-7
IPC 8 full level
B22D 11/00 (2006.01); B22D 11/04 (2006.01); B22D 11/041 (2006.01); B22D 11/049 (2006.01); B22D 11/10 (2006.01); B22D 11/103 (2006.01)
CPC (source: EP US)
B22D 11/007 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
US 4567936 A 19860204; AU 4837485 A 19870409; AU 569807 B2 19880218; EP 0219581 A1 19870429; EP 0219581 B1 19890614; JP S62104652 A 19870515
DOCDB simple family (application)
US 64190884 A 19840820; AU 4837485 A 19851008; EP 85307092 A 19851003; JP 24382285 A 19851030